Amaimon is the seventh of the ball that comes from Gehenna he like his bother's and sisters is a conceptual entity that was made by the king of demons Satan
amaimon like all demons has two weak points his tail and demon heart pulling or hurting the tail is more of a minor weakness that will stagger him for a second or two but the demon heart is his and every other demon's main weakness if it is destroyed amaimon will automatically die but for a demon to use its full strength it must have its demon heart in the open and because of this all demons hid both weaknesses and a some of amaimons power has been crystalized in amahara plus if amaimon goes overboard his body will destroy its self